Spring damping truck



May l0, 1938.-

E. w. WEBB SPRING DAMPING TRUCK Original Filed Feb. 15. 1932 2 sheets-Sheet 1 May 1o, 193s. E WEBB Re. 20,723

SPRING DAMPING TRUCK l original Filed Feb. 13. 1952v 2 sheets-sheer 2 f5.. m? EN.. NW# wb. 2% IWA a/ iff- Reuma May 1o, 193s.

UNITI-:D o STATES PAU-:Nr 'orner-i Y srnmo name. 'moon Edwin w. wett, clam, nl., mmf to starmi ard Car Truck poration of New Jersey Original No. 1,894.3, dated January 11, lass,

Serial No. 592.722, February 13, 1932. Applicareissue December tion for A, 177.814

for carftrucks.

This-application is one Yof a group of three applications directed to spring damping means for car trucks. My application lSerial Number 592,720, flied simultaneously herewith and entitled Lateral motion spring dampingcar'truck is one or this group of three applications, while my application for patent Serial Nnmizier 592,721,

o' .also med simmtaneously with this,l application and entitled Spring damping car truck is a second application of this group. The present invention embodies the inventions disclosed in the above identied applications in their broader as- 5 pects, but diiiers considerably from said above identied inventions in its more specific aspects.

Generally stated,l it is the object of the invention to provide a novel and improved spring l l damping car truck having certain advantages in its construction over those disclosed in my prior above identied' applications for patent.

To this end, generally stated, the invention consists in the novel parts and novel combinations of parts hereinafter defined in theclaims 5 and described in the following specification, made in connection with the accompanying drawings, wherein like reference characters refer to the same or similar parts views and in which,

o' Fig. l is a view partly in side elevation and partly in vertical longitudinal section taken through portions of a car truck wherein the present invention is embodied;

.- sta'ntiaily on the line 2 2 of Pig.' l, as indicated by the arrows: y i Fig. 3 is a vertical sectional view taken substantially on the line 3 3 of Pig. l, as'indicated by the arrows, `the truck bolster being shown chiey in side elevation: A

Fig. 4 is a vertical longitudinal section taken substantially on the line 4 4 of 5 through a Deir of co-atlng wedges: y

lig. 5 is a view in end elevation of the vsaine wedges; and

Fig. 8 is a bottom view ofthe co-acting wedges.

Referring to -the drawings', portions of a car truck are illustrated, which include a side frame Ihavingabolsteropeninglwithinwhichone end of-a car truck bolster l is One end of a spring plank Il, disposed within the bolster opening l rests on the side frame and4 a group of coiled bolstersprings Ii'are at their lowcrendswithinthebolsteropeningonthisend oi the spring plank Il. Theside fl'amev 'I has side throughout the various Fig. 2 is a horizontal sectional view taken subof the springs 2l.' The l, 1937, Serial No.

, s chimp (ci. '10s-isti! This invention relates to spring damping means y webs I2 laterally spaced from each other and'interconnected by vertical cross webs I3 andthe side webs i2,. together with the vertical'webs Il,

form the bolster columns of the side frame. The inner surface of each crossweb Il is lined by a wear plate Il secured to web Il as by means of rivets Ii. At thesides of the bolster opening l and adjacent the bottom of the same, short hori- -zontal webs I6 are lprovided which interconnect the side webs I! and form spring seats. The side frame 'i forms an arch-bar I1 of .channel-shape in vertical cross section, which traverses. the upper portion of the bolster opening 8.

A combination roller seat and chang member i8 has a bottom ila which rests upon the upper ends ofthe bolster springs ii. Laterally spaced roller contours IIb are formed on the upper sur-A face of bottom ila`and supported within these' contours are lateral motion rollers i9 which nt within laterally spaced roller contours 9a formed on the bottom surface of the end of bolster i. 'I'he end of the bolster l is accordingly supported for lateral motion transversely of the truck and relative to the side frame i by the rollers il resting on the combination seat and chaiing member Il, which is, in turn,.supported by the bolster springs ii. Ihe chaing member il lhas vertical sides llc of channel-shape in horizontal cross section. as best shown in Pig. 2, and these channels are closed at their upper ends by meansH of cross webs ild. The upper ends of the sides llc are interconnected by a'top ile which traverses the end of the bolster 9. andis preferably of channel-shape in vertical cross section.

Resting on the` horizontal webs forming the spring seats Il are springs Il which are ofmaterially less capacity than the bolster springs and which project upwardly 'to points about level with the normal position oi the lower surface of the bottom Ila of chang member I8. i ,A pair of cooperating wedges 2i and 2K2 respectively are interposed between Veach side'llc of the chailng these wedges rest on ,and are supported by one wedges 2i .have horizontal bottom surfaces against which the upper ends of the 'springs ject vdownwardly from the bottom sin'iaces of these wedges 2| to partly encompass the upper ends of the springs 2l. yWedges 2| may be designated outer wedges in contra-distinction .to the wedges 2! which may be designated inner wedges.

The outer wedges Ii have diagonallyinclined inner surfaces which proiect from adjacent the III bear and arcuate lugs ila pro' .member and wear plate il* facing the same and bottomsoi' the wedges upwardly and outwardly l5 2 i i toward the outer surfaces of the wedges 2|, while the inner wedges 22 have outer inclined surfaces which engage the inclined surfaces of the outer wedges 2l. 'Ihe inner wedges 22 are recessed downwardly from their upper their inner edges and the webs lid of the channg' member IB bear against the recessed surfaces oi'v thelinner.wedges 22. It will be seen that the inner portions of the inner wedges 22 are received within the channels formed by the sides llc of the chang member Il and, accordingly, lateral movement of the inner wedges 22 is impossible.

W opposite .endoi' the bolster l from the end shown The inner wedges 22 have downwardly projecting triangular flanges 22a-which are received within triangular-shaped recesses 2lb formed inthe sides of the outer wedges 2 I and thus lateral movement of the outer wedges 2| relative tothe inner wedges 22 is impossible. Although the wedges 2l and 22 are illustrated in the drawings as being of solid formation, these wedges may be.

cored to lighten the same when they are cast if desired.

Although in the drawings, but one end of the truck bolster 9 is illustrated andV only one side frame structure is shown for supporting this end of' the bolster, it will be understood that the in the drawings, will be supported by` a side frame structure which is a duplicate of the structure illustrated and described. n

When the car truclr is in service, as the wheels of the truck run over high spots on theI rails, the bolster springs Il will be compressed thereby causing the end of the bolster 9 supported by the sidel frame 1, to lower somewhatrelative to the side frame and thereby move chang member' il downwardly somewhat relative tothe bolster r columns formed by the side webs l2 and verticalcross webs il. Asthe cross webs ltd of the chafing member Il rest on the l,inner wedges 22, wedges 22 and 2l will tend to move with the chaflng member Il. Springs 2l will resist downward movement of wedges. 2l relativeI to (the side frame 1 and as a result, inner' wedges 22 will tend to `slide on outer wedges-2l to urge the vwedges 22 into tighter engagement with the sides llc of chatlng member II and to urge wedges 2i into tighter engagement with wear plates Il. The frictional engagement between the outer surfaces oi' the wedges 2i and the wear plates il will offer resistance to the downward movement of the chafing member Il and the 'end of bolster 9 relative to the side frame 1 and. thus the compressive action of the bolster springs II will be damped. The added resistance onered by the wedges 2l and 22to the of the., springs, `l l increases tremendously as the forces tending to compress the springs ll are increased. In other wor as the springs Il are increasingly compressed, the added resistance oil'ered to the compressive movement of the springs will be much more than directly proportional to the increase in .the forces tending to compress the springs. The angle formed by the inclined surfaces of the wedges 2 I` and 22 with the vertical is such as to furnish maximum frictional 4 'this lateral motion of the truck bolster possible.

surfaces adjacent wedging relation against portions of said side ltioned` springs urging said wedges into tighter resting on said inner wedges compressive movement disposed within sonas supporting the ends of the truck bolster l make It will be apparentl that if it is desired to elimi- 'nate the lateral motion feature of the lpresent truck, this can easily be done by modifying the .s construction slightly. 'Ihe words truck bolster structure", as used, in the claims, are to be construed broadly enough to include any. suitable bolster, such as an ordinary bolster not equipped with. the combination` roller seat and member il, and rollers i9, aswell as a bolster construction including such parts as bolster 2. combination roller seat and'chafing members Il and rollers I9.

It will, of course, be understoodV that various i changes may be made in the form. details, arrangement and proportions of the various parts without departing from the scope of the'present invention. Y

What is claimed isz- 1. In a'car truck, side. frames having bolster openings, a bolster structure having ends disposed within said bolster openings, bolster springs supporting the ends of said bolster structure from said side frames, pairs of oppositely disposed f wedges interposed between the' sides 'of said bolster structure and portions of said side frames, the outer wedges of said pairs working in lateral frames, each end of said bolster structure resting on one wedge 4oi! each pair -and springs of materially less capacity than the bolster springs l interposed between the other wedges of each pair and portions of said side frames, said last menwedging relation as said creasingly compressed.

-2. In a car truck, side frames having'bolster openings, a truck bolster structure having ends disposed within said openings, bolster springs supporting the ends of said bolster structure from said side frames, inner and outer oppositely facing and contacting wedges interposed'between the sides of the ends of said bolsterstructure and portions of said side frame, the outer wedges working ln lateral wedging relation against portions of said side frames, said bolster structure and vertically disposed springs of materially less capacity than said bolster springs reacting betweensaid outer wedges and other portions of said sidefram saldlastme'ntioned springs urging said wedges into tighter wedging relation as said lbolster springs are increasingly compressed.

'-3. In a car truck, side frames having bolster openings, a truck bolster structure having ends disposed within` said openings, bolster springs supporting the ends of said bolster structure from said side frames, said` side, frames having surfaces disposed in spaced parallel relation from the sides of said bolsterstructure, inner and outer oppositely facing and contacting wedges interposed between the sides of said bolster structure and said facing surfaces of said .side frames, the ends of said bolster structure resting on saidfinner wedges and vertically disposed springsl of materially less capacity than the bolster springs interposed between said outer' wedges andlportions of saidside frame below the same.

4. In a car truck, side frames having bolster openings, a truck bolster structure having en said openings, bolster spring supportingtheendsofsaidbolster structuref m said side frames, 'said side frames having surf e spacedfranthesidesoftheendsofsaid J- bolster springs are instmchne, inner and outer opposite!! facing and contacting wedges interposed 'between the sides oisaidbolsterstructureandsaidspacedsuriaces. said sidetrames having spring supports beiow saidwelkesandspringsotmateriailylesscapacity tlnn' the bolster springs resting on said spring supports and bearing at their upper ends against said outer wedges.

5. In a car truck, side frames having bolster openings. spring supports at-the sidesvof said bolster openings adjacent the lower ends thereof; and vertical cross webs spaced'i'rom said bolster openings adjacent the upper enen thereof, a truck bolster structm'e having ends disposed within said bolster'epeninnbolster sprims supporting the ends o! said bolster structure .from said side trames, inner and outer oppositely facing and contacting wedges interpod between the sides ofthe ends oi'rsaid bolster structure and said vertical cross webs, said bolster structure resting on said inner wedges andspringsofmateriailylesscapacitythanthe lplllllmnlitthdi'lmrlidlmllld springsupports andsupportirusaidoutei'wedges.4

8.Inacartruok,sideframeshavingboister openim,atnickboisterhavingendsdlsposed within said openings, bolster springs supported by said side frames. members supported by said springs, lateral motion devices interposed between .aid members and the ends of said holsters.

inner and outer wedges having diagonal facing and contacting surfaces and interposed between the sides ot said members and portions of said side frames, said members resting on said inner wedges and springs of materially less capacity than the `bolster springs interposed between said outer wedges and portions of said side trames and urging said wedging members into tighter wedging relation as said bolster springs are increasingly compressed.

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